Introduction

A route map is a kind of an access list that enables a network engineer to direct traffic in a highly customizable manner. Route maps are used in policy-based routing (PBR), wherein a network engineer overrides a router’s forwarding table by configuring the direction of traffic before the router can calculate that direction. Route maps are also used to filter routes during redistribution between routing protocols and to modify route metrics and attributes on BGP neighbors.

Route maps use the IF-THEN logic to compare a request for access against the configured permit and deny conditions. The comparison is run in sequence, until a matching condition is found or an implicit deny stops the sequence. Access lists, prefix lists, DSCP values, IPP values, packet lengths, and many other criteria can be used for this purpose. If the match statement returns true, a custom set command can be executed to change DSCP, IPP, Next Hop, BGP local preference, BGP weight, and other values. The match and set components of a routing map are configured by using the following parameters: sequence number, conditional matching criteria, processing action, and optional action.

Contents of the Infoblox Route Map page

The page is accessed through Cloud Services Portal > Manage > Routing > Route Maps and displays the following information for each route map you have created:

• Name

• Description

• An indication of whether a map is Enabled or Disabled.

Click for a particular route map, and review the following details:

• Action: The action configured for the route map rule. This can be Block or Allow.

• Name: The name of the route map rule.

• Match Conditions: The type and value of each match condition.

• Set Conditions: The type and value of each set condition.

You can do the following on the Route Maps page:

• Create a new route map: Click the Create button, and follow the instructions in Creating Route Maps.

• Edit a route map: Select the route map you want to modify, click Edit, and follow the instructions in Editing Route Maps.

• Remove a route map: Select the route map you want to remove, and click Remove.

• Enable a route map: Select the route map you want to enable, and click Enable.

• Disable a route map: Select the route map you want to disable, and click Disable.

The following topics describe each action in detail: